Learning objectives
The postcontrast 3D m-Dixon T1w turbo field echo (TFE) sequence,
obtained on a 1.5 T Philips MR scanner,
allows a reliable detection of pathologic lesions in brain parenchyma,
meninges,
neurocranium and viscerocranium and soft tissues of the head and neck.
This sequence replaces both the postcontrast 3D T1w TFE sequence used for pathologies in the brain parenchyma and the meninges as well as additional transverse and coronal postcontrast 2D m-Dixon T1w turbo spin echo (TSE) sequences used for detection of pathologies in the soft tissues...
Background
T1 weighted (T1w) postcontrast MR images are routinely obtained in patients examined for cerebral parenchymal and meningeal pathologies because they help to narrow the differential diagnosis in brain tumours (both metastases and primary cerebral tumours),
in subacute ischemic cerebral infarcts as well as in inflammatory and infectious cerebral diseases (1,2).
In clinical routine contrast enhanced T1w sequences usually are acquired as a 3D T1w gradient-echo sequence (1,2).
In our department with 1.5 T and 3 T Philips scanners,
a sagittal postcontrast3D T1w TFE sequence is...
Findings and procedure details
PROCEDURE DETAILS
All MR images have been obtained on the 1.5 T Ingenia Philips scanner with sequence parameters shown in table 1.
The postcontrast 3D T1w m-Dixon TFE sequence has a stable and homogeneous fat suppression achieved by the help of the m-Dixon technique (5).
A reduction of movement artefacts is possible by the use of 4 numbers of acquisitions (NSA).
A reduction of the susceptibility artefacts is obtained by using a high receiver bandwidth.
Table 1: Parameters used on 1.5 T MR Ingenia Philips...
Conclusion
The postcontrast 3D m-Dixon T1w TFE sequence can replace both the postcontrast 2D m-Dixon T1w TSE sequence and the postcontrast 3D T1w TFE sequence for reliable depiction of contrast enhancing lesions in the brain and meninges,
the viscerocranium and neurocranium and the soft tissues of the head and neck region as demonstrated in Fig.
26.
The diagnostic reliability and the image quality of this postcontrast 3D m-Dixon T1w TFE sequence is identical to the two replaced series,
but the new series offers the advantage of...
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